The vacuum suction device is a very versatile device used in the laboratory, industrial production, medical or civil fields. Many laboratory users have great doubts when choosing a vacuum pumping device. In the face of complicated models and extremely different prices, they often have no choice but to purchase some products in the industrial and civil fields. After using for a period of time. It was discovered that it was not suitable for laboratory use. This article will briefly describe the differences between the filtration devices used in the laboratory and the products used in other industries:
Single filtration amount: The amount of single sample filtration will determine the capacity of the filter. In industrial production and other fields, the amount of single filtration sample is usually several tens of liters or even hundreds of liters, so the filter volume is large. In the laboratory for testing, solvent sterilization or clarification, the general filtration amount is relatively small. If the filter device for industrial use is used, the sample loss is too large, and the use process is extremely inconvenient, which wastes the limited indoor space of the laboratory. In particular, some laboratory customers need to filter samples that are very expensive and expensive. They require a laboratory-sized filter membrane and a small-volume filter bottle to ensure that no precious samples are wasted. In this case, St. -M1 vacuum filter bottle for 25mm diameter filter membrane, ideal for suction filtration of expensive samples.
There are many kinds of filtering purposes: in general, filtration needs to achieve the purpose of solid-liquid separation. Generally, in the civil and industrial fields, most of the impurities are filtered to remove impurities in the slurry. However, the type of laboratory filtration is very complicated, including clarification or sterilization reagents for subsequent use, filtration of solids or suspended solids in the sample for weighing detection, retention of microorganisms or bacteria on the filter for culture, and the like. Different filtering purposes often have different requirements for the structure, material, capacity, type of pumping pump, etc. of the filtering device. For example, when the customer performs the sterilization filtration of the medium, in order to ensure that the filtered sample is not subject to secondary pollution, the filter funnel to be used should be able to directly connect the reagent bottle with the cap. If a general filtering device is used, after filtering, If you need to pour it out, you may be polluted again. Therefore, for this kind of customer St. Special designed R300-500 medium sterilization filter device, you can directly connect the blue cap reagent bottle to facilitate the preservation of the filtrate after filtration.
Material of the filter device: As mentioned above, due to the wide variety of filter samples in the filtration laboratory, it may encounter aqueous solutions, organic volumes, and potentially corrosive samples, which may be applicable to both the filter and the pump. There is no requirement, so the filter bottles of St. Stephen's laboratory suction filter are glass, 304 stainless steel, 316 stainless steel, polyethersulfone, polycarbonate and many other materials. For the highly corrosive and volatile sample filtration, a corrosion-resistant vacuum pump made of PTFE material is also available. Generally, there is no special demand for corrosion resistance in products in the civil or medical field, and there are fewer types of materials that can be provided.
For more information about the selection of laboratory vacuum filtration equipment, please visit our website http://, or call us.
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